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October 1, 2015 21:22
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Retornar a primeira imagem do post [Get the first post image]
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<?php | |
/** | |
* Retorna a tag <img> com a primeira imagem de um post. Caso o post não tenha imagens, | |
* retorna uma imagem padrão. | |
*/ | |
function get_first_image( $args = array() ) { | |
global $post, $posts; | |
$args = wp_parse_args( $args, array( | |
'native_class' => true, | |
'class' => false, | |
'default_alt' => '', | |
'default_image' => get_template_directory_uri() . '/img/default.jpg', | |
'echo' => true | |
) ); | |
$first_img = ''; | |
$matches = ''; | |
preg_match_all( '/<img .+src=[\'"]([^\'"]+)[\'"].*>/i', $post->post_content, $matches ); | |
$first_img = ( $matches[0] ) ? $matches[0][0] : false; | |
// Se não houver imagens | |
if ( empty( $first_img ) ) { | |
// Define uma imagem padrão | |
$img_atts = array(); | |
$img_atts[] = 'src="' . esc_url( $args['default_image'] ) . '"'; | |
$img_atts[] = ( empty( $args['default_alt'] ) ) ? 'alt="Post Image"' : 'alt="' . esc_attr( $args['default_alt'] ) . '"'; | |
$img_atts[] = ( empty( $args['class'] ) ) ? '' : 'class="' . $args['class'] . '"'; | |
$img_atts = join( ' ', array_filter( $img_atts ) ); | |
$first_img = '<img ' . $img_atts . '/>'; | |
} else { | |
if ( false === $args['native_class'] ) { | |
// Se já tiver alguma classe | |
if ( false !== strpos( $first_img, 'class=' ) ) { | |
$replace = ( false === $args['class'] ) ? '' : 'class="' . $args['class'] . '"'; | |
$first_img = preg_replace( '/class="*"/i', $replace, $first_img ); | |
} else { | |
$first_img = ( false === $args['class'] ) ? $first_img : str_replace( '<img', '<img class="' . $args['class'] . '"', $first_img ); | |
} | |
} else { | |
// Se já tiver alguma classe | |
if ( false !== strpos( $first_img, 'class=' ) ) { | |
$replace = ( false === $args['class'] ) ? 'class="' : 'class="' . $args['class'] . ' '; | |
$first_img = str_replace( 'class="', $replace, $first_img ); | |
} else { | |
$first_img = ( false === $args['class'] ) ? $first_img : str_replace( '<img', '<img class="' . $args['class'] . '"', $first_img ); | |
} | |
} | |
} | |
if ( $args['echo'] ) { | |
echo $first_img; | |
} else { | |
return $first_img; | |
} | |
} |
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